Illuminating apparatus



Oct. 5, 1937. E. RAMBUSCH' ILLUMINATING APPARATUS Filed June 9, 1936 INVENTOR. Edward flamZwc/z Patented Oct. 5, 1937 UNITED STATES PATENT- F E- ILLUMINATING APPARATUS Edward Rambusch, New York, N. Y., assignor to Rambusch Decorating Company, a corporation of New York Application June 9, 1936, Serial No. 84,279

2 Claims.

. a small opening in the ceiling or in the fixture itself. The invention may be incorporated in a structure which may be wholly or only partly hidden above the ceiling depending upon the space available.

Among the objects of the invention is to provide a novel construction designed so that the sourceof light cannot be seen by an occupant of the space to be illuminated except when viewed from a circle of illumination nearly directly under thefixture, and yet, the light rays pass directly from the light source and reflector through the opening in the ceiling or fixture to the space to be illuminated without the loss attendant upon multiple reflection and the passage of light rays through refracting and diffusing glass or the like.

An advantage of the invention is that the reflector behind the source of light is inverted and looks downwardly and the fixture is closed at the top so that it will not collect dust or dirt as it would if it were open and the reflecting surface faced upward. I Still another object of this invention is to provide a fixture which is wholly or partly hidden above the ceiling with only a verysmall opening in the ceiling to allow the light rays to pass through. This makes an economical installation becausethe fixture does not have to be elaborately of the invention:-

Fig. 1 is a side elevation in section of one embodiment of the invention.

Fig. 2 is a section through 2--2 of Fig. 1.

Fig. 3 is a side elevation in section illustrating the construction of the adjustable supporting de-. vice for the lamp socket.

looking at Fig. 1 the light fixture is illustrated as supported upon the top of the ceiling of the room to be'illuminated. The ceiling shown "In the drawing illustrating a preferred form at I has a circular aperture therethrough illustrated at 2. The fixture comprises a substanhinged at 5 to a supporting plate 6 which is adapted to rest on the top side of the ceiling I immediately above the 5 aperture 2 and has a circular hole I through the middle thereof so designed as to coincide with the hole 2 when the fixture is in place.

The plate 6 is equipped with a pair of vertically disposed slotted ears or side members illusbe conveniently formed by stamping them as an integral part oi plate 6 and then turning them up into the position shown. Adjusting'means comprising abolt and wing nut is attached to the side of the body portion 4 so as to cooperate with the arcuate slots in the members in and I l to allow the fixture to be clamped in any position within the limits of the slots to provide for angular adjustment of the tially cylindrical body portion 4 trated at in and H. These may light rays as will be more fully "after.

discussed here- The arcuate slot in the member lllis shown at l3 and the corresponding adjusting wing nut and bolt at l4. The wing nut and bolt for the member H is shown at i5.

to engage the upper edge of the means of the annular sleeve 20; It is advantageous to make a close flt between the collar l8 the sleeve 20 and the reflector l1 and the inside of the body portion 4 and between so as to exclude dust and dirt but at the same time provide for a convenient method of disassembling the fixture to permit it to be cleaned and adjusted or to replace a lamp.

The source of light is an electric lamp shown at 22 with a filament shown at '23. The lamp is carried by a lamp socket 24 which in turn is supported on a hollow rod or tube 21 which is adapted to slide longitudinally in a cylindrical member 28 which is supported on arm 29 riveted to body member 4 at 3|. The cylindrical member 28 is equipped with wing nut bolts 32 and 33 which are adapted to engage the tube 21 to hold it in position. The location of the lamp filament in relation to the reflectors may thus be adjusted to provide for proper focus. The lamp cord or wire is illustrated at 35. a The interior of the body portio n 4 is equipped with a number of annular baifle plates one disposed above the other as illustrated at 4|, II, R

will be focused in the-plane of the ceiling l in g the aperture 2. The lighting fixture may be conveniently attached to the upper side of the ceiling by screws such as those illustrated at 41 which are adapted to flt in holes drilled through plate 0.

The light emitted by the fllament 23 may pass directly downwardly through the opening I in the plate iand the opening 2 in the ceiling l. Rays which pass downwardly to the right and left as viewed in Fig. 1 will be reflected back by the spherical reflector H to the elliptical reflector l9 and thence downwardly to a focal point in the opening 2. Similarly, rays which pass upwardly from the filament 23 will strike the reflector II and be reflected downwardly and focused at the same point as indicated by the dotted lines.

From the plane of the ceiling the light will diverge into a cone of illumination to light the room below. The bailles prevent the interior of the body portion 4- from appearing brightly illu' minated when viewed from below through the aperture 2 because they arrest reflected light. If they were not present the whole interior of the body portion of the flxture would be brightly illuminated and an occupant of the room below looking through the aperture 2 at an angle with the vertical would see the interior of the fixture whereas with the baiiies in position the undersides thereofand the adjacent side walls of the body portion 4 are in shadow and will not be visible from below.

The adjustable supporting means for the lamp socket is not claimed as my invention and is well known in.the art so I do not desire to be limited to the particular construction illustrated in Fig.

isadvantageoustomakethesocketadjustableto.

compensate for a difference in the dimension of lamps made by diflerent manufacturers or a difference in dimensions of lamps of different sire and wattage.

It is of course lmderstood that the specific description of structure setforth above may be departed from without departing from the spirit of my invention as set forth in this specification and the appended claims.

I claim: r 1.In a device of the character-described, a bodyportion adapted to be positioned above the ceilingoftheroomtobeillmninatedalight source near the top of said body portion, a re: flector above said source adapted to focus the light rays emittedtherefromat ashort distance below saidsource,anopeninginthebottanof said body portion so positioned in relation to the reflector and source lisht that reflected light rays will be focused substantially in said opening and pass therethrough to the roomto be illuminated, means for adjmtably positioning the iongitudinalaxis 01' said body P rtion to direct the light rays in a predetermined direction, said means including a hinge adapted to permit the body portion to be moved from a vertical axis to anaxisdisposedatanangletotheverticalao thatthe directionof thelightraysmaybead- Justed.

2.Inadeviceotthecharacterdescribed,a bodyportion,alightsom'oe,anopeninginthe bottom of said body portion, a reflector above saidlightsourceadaptedtofocusthereflected lightraysinsaidopeningastheypasstherethrough, annular baille plates axially dimmed along the interior sides of said body portion, and ahingetoenable saidbodyportiontobemoved so that its lo itudinal axis will be mull-r114!- posedto'thevertiealsoastopermitthedireetion of the lishtraysemittedbytheiliuminating device to be adjusted.

RAIIBUBCH. 

